Boring-head.



H. A. PEDRICK.

BORING HEAD.

APPLICATION FILED MN. 24, I917- Patented June 12, 1917.

2 SHEETS-SHEET I.

H. A. PEDRICK. BORING HEAD.

APPLICATION FILED 1AN.24. I917.

Patented June 12, 1917.

2 SHEETS-SHEET 2.

, Howm'A". rnnarcxf'or BALA, PENlVSZLVANIA, Assrenon ro'PEnBIcx'rooL Ann MACHINE COMPANY, or PHILADELPHIA, PENNsYLvANIA,A FIRM consrs'rme or ALBERT nirnn'mcx Ann HOWARD .PEDB'ICK.

BORING-HEAD.

Specification of Letters Patent. Patented June 12,1917.

H Application fl1 ed'J'an uary24, 917. Serial No. 144,205.

To all 'wliom it may concern Be it known that I, HOWARD A. PEnRIox,

a citizen of the "United States, and a resident 1 of Bala, Montgomery county, Pennsylvania,

have inventedja Boring-Head, of whiph the form of boring head especially designed for use in re-boring engine cylinders although head having itsvarious parts so "designed and assembled as to permit the boring or tool carryin'g bar to properly-perform its functions although supported at" one end I only;the' constructlon bemg such as to fa-1 cilitate the application of the device'to and its removal from the structure upon whichit solely by the head. v

These objects :and other. advantageous-'-- ends I secure as hereinafter set. forth, refer M the accompanying draw- F y 1 a "bracket" 18 carrying an adjusting screw. 19 whereby its position, and therefore that of is intended-to operate.

Another object of the invention is pro vide a novel form of boring head and "driv-i carried by the boring bar'5. In order to ing'mechanism in which 1 the parts are .so arranged that said mechanism is supported ence being hadv to ings, in which, v Figured is aside elevation, partly'm' section illustrating; a-I boring. head, together with certain of the parts. associated therewith constructed :andarranged according to sleeve 3 carrying bearings 4 for the cutter-or tool-carrying bar 5; At one end said sleeve 3 is provided with a, pair of oppositely projecting foot-like extensions 2 having flat my invention; Flg. 2 is an Fig. 4 is a diagrammatic view 'illustrat ing employed; and I A.

ig's. 5and 6 are perspective views illustrating the detail construction of two of;

the partsof my invention.

fIn-the above drawings 1 represents the "ff ame or supportin structure of my: boring T head, which inclu es a tubular portion or by no means limited to this work;-the i1'1- boring; I nut 12.' This is designed to cooperate with o e clamping bolts are tightly set up. elevation'ofone en 7 of the For driving the cutter bar 5, I rigidly atapparatus shown'in- Fig. 1; g

40, 'g. 3 is a transverse 580131011011 theilin'e.

., 3-3, Fig.1;

the arrangement of certain of the gearparallel slots 6, preferably though not necessarily arranged in two sets on opposite sides.

of webs 7 whereby said extensions are suitably braced to the sleeve. The extensions 2 include cylindrically curved side portions 8 concentric with the sleeve 3 and have mounted between them a retaining rin or thrust cage 9 including feet 10. Co between this ring 9 and the adjacent end of the sleeve 3 is a collar 11 constituting a feed nut retainer and having a slot parallel with its center line for the reception of a feed or be engaged by a feed screw "13' rotatably mounted within a longitudinal slot orde pression in the cutter or tool carryin bar 5,

i by a which passes; throughand is guide collar 14 carr'iedby the ring 9.

of a pair of supporting or filling blocks 15,

' -whose opposite parallel face isformed for The'foot portions 2 of the frame 1 are bolting to the structure, such as the engine facilitate the mounting of the blocks 15 on said cylinderand their adjustment to the frame-1 ofthe boring head, they are likewise provided with sets of elongated slots 17 and each block also has bolted to' itxa tach to the projecting end of the bearing tube 3 (as by means of a set screw) "a sup- I porting plate 20, which through filling .or

spacing blocks 21, supports a frame carryinga train of'driving gears. Said frame incylinder .16, to be operatedon. by the tool I "eludes two substantially similar and par-- allel pla'tes'22'and 22 mounted upon the hub of a'double gear 24 which is keyed to the boring or cutter bar 5. These two "plates are rigidly connected and spaced apartin' any suitable manner, as by bolt and sleeves 23, and provide bearings for a shaft 25 to which power may be applied from any desired source. On this shaft is fixed a small gear or pinion 26 meshing with the teeth of a gear 27 fixed to a second shaft 28 rotatably carried by the plates 22 and 22 and likewise having fixed to it a pair of 4 outer end of the boring bar 5 and in turn I supporting a cross shaped frame member 50 through columns 51. This latter provldes a bearing for the spindle 33 of a hand wheel 31, which through suitable gearlngforming no part of the present invention, ls'deslg'ned to turn in either direction a gear 32 whlch is fixed to the feed screw. For this purpose the spindle 33 on which said hand wheel is fixed has keyed to it three gears 34, 35 and 36, respectively meshing with three other gears 37, 38 and 39, loose on a counter shaft 40 to which any one of them may be operatively connected bya sliding key 41.

This counter shaft has fixed to it a gear 42 which through a pair of gears 43 and 44,

is designed to drive the gear 32 in one direction. By suitable adjustment about the counter shaft 40, another gear 45 meshing} with the gear 42 may be swung into engage ment with the gear 32 at the same time that the gear 44 is caused to disengage the latter, so as to reverse the direction of movement of the feed screw.

With the above described arrangement of parts it is a relatively simple and conveniently accomplished operation to mount and adjust my boring head on any structure which is to be operated on, such as the engine cylinder shown. For this purpose the spacing or filling blocks 15 are loosely mounted on said cylinder by suitable bolts, of which two are shown at 60, and the frame structure 1 is then mounted upon said filling blocks by bolts 61. the screws 19,'the position of the boring head on the cylinder is adjusted until the center line of the boring bar has been brought to the desired position relatively to the structure to be operated on, whereupon the two sets of bolts and 61 are tightly set up.

Power applied to the shaft 25 will now be transmitted through the gears 26, 27 and 24 to the boring bar 5' which is thereby turned ;it being understood that a suitable.

tool or cutter or cutter carrying member has been previously mounted in or attached to said bar. By means of the hand wheel 31,-

the feed screw 13 may be turned and by reason of it's .coaction with the feed nut 12,-

may be caused to longitudinallymove said bar into and through the cylinder at any desired rate, thereby causing the tool or cutter to operate on the sired manner.

Thereafter by means of cylinder' in the de- Iclaim; v

1. The combination in a boring head of a frame having a recess at one end; a boring bar rotatably mounted in said frame and passing through the recess; a feed screw carried by the bar; afeed nut within the recess engaging said screw; means for turn- Q ing the boring bar; and means for rotating the feed screw.

2. The combination in a boring head of a frame having a recess; aboring bar rotatably mounted in said frame and passing through the'recess; a collar mounted in the recess; a'feednut engaged by the collar; a member retaining the collar in the recess to prevent its longitudinal movement; means for turning the boring bar; and a screw engaging the nut for feeding the bar.

3. A boring head consistingof an elongated sleeve havingbearings and including bolting feet formed toprovide a recess adjacent one end; a boring bar movable through the recess; means for turning said bar; with means including an element in the recess for causing longitudinal feeding of the boring bar.

4. The combination in a boring head of a frame having a recess; a boring bar rotatably mounted in said frame and passing through the recess; a collar in the recess; a feed nut engaged by the collar; means for preventing longitudinal movement of the collar and nut while permitting them to turn with the bar; a feed screw carried by the bar and engaged by the nut; means for rotating the bar; and means for turning the screw independently ofthe bar to feed the latter at will.

-5. The combination in a boring head of a frame consisting of an elongated sleeve and supporting feet at one end. of' said sleeve; a'boring bar rotatably mounted in and engaging said feed screw for causing longitudinal movement of the bar when the screw is turned; means for turning the bar; and means forrotating the screw.

6. The combination ofa boring head consisting of a sleeve having feet adjacent one end; a frame c'arriedby the opposite end of said sleeve; a boring ,barpassing through the sleeve and: projecting adjacent said frame; a driving shaft journaled in the frame; gearing supported by the frame and operatively connecting said shaft with the boringbar; a feed nut carried by the boring head; a feed screw; and means including gearing carried by the boring bar for causing the feed screw to cooperate withthe nut to longitudinally move said bar.

7. A boring head consisting of an elongated sleeve; oppositely placed extensions v at one end of said sleeve each consisting of webs respectively bracing said bolting plates to the sleeve; a boring bar journaled in the sleeve; with means for longitudinally moving and rotating said bar.

b. The combination in a boring head of an elongated sleeve; a collar rotatably mounted at one end of said sleeve; means for preventing longitudinal movement of the collar; a feed nut engaging the collar; a boring bar passing through the collar; and a feed screw rotatably carried by the boring bar and engaging with the feed nut.

9. The combination in a boring head of an elongated sleeve; :1 ring carried by said sleeve but spaced away from one end of the same; a collar rotatably mounted between said end of the sleeve and the ring but prevented from longitudinal movement by the latter; a nut engaged by the collar; a

boring bar journaled in the sleeve and passgaging said feed screw; and means for pre- 1 venting longitudinal movement of the nut. In witness whereof I aflix my signature.

HOWARD APEDRIGK. 

